Investing is the best way to go about utilizing 21+ BTC. only to increase riches further.
thats true, ivesting into some kind of a new crypto with huge potential might be the thing you want to do in order to make money out of the money you already have
That is just a mere prediction that we are telling a crypto coin that has a good potential but it was not tested already, if you are talking to some altcoins, I would not trust my investment for a long period of time, you can only choose some high volume alts but most likely it is just a pump and dump game because only bitcoin is legit.